after a hearing last may. he says that never happened. he questions why the fbi's investigation into petraeus remains open 16 months after the general resigned. quote, my understanding is that as of today, the investigation into general petraeus is still ongoing. when will the investigation conclude? what are the issues still in question? he says the justice department should provide an answer quickly, given the serious allegations against petraeus' former number two, mike morell, who's accused of misleading congress over the talking points. during that may hearing last year, holder had few answers. >> when did you first learn about the investigation into general petraeus? >> i'm not sure. i'm not sure. some months -- i think a couple months after it began. >> do you know when general petraeus was notified or had any sense that he was under investigation? >> i'd have to go back and look. >> the issue here is whether petraeus knew about the fbi investigation at the time of the benghazi attack and was distracted or felt under pressure because his career was hanging in the balance.